Printing-machine.



W. SCOTT, DECD.

1. an D. J. sooTT, BxBcUToRs.

PRINTING MACHINE..

APPLIoATIoN FILED 11211.15, 1908.

Fig; 1

Patented Now, 1911.

ATTORNEY.

A No. 318,615.

'muren sinrns rafinnr OFFICE.

ISABELLA SCOI-T AND DAVID J. SCOTT, OF PLAINFIELD, NEI-V JERSEY, EXECUTORS 0F WALTER SCOTT, DECEASED.

PRINTING-MACHINE.

incasso.

specification of Lettersratent. Patented Nov, 7, 1911, @riginal application led May 25, 1906, Serial No.-318,615. Divided and this application filed February 15,

1908. Serial No. 416,150.

To all whom 'it may concer/n: Be it known that WALTER SCOTT, a citizen of the United States, and late of Plaineld,'

larly, though not exclusively, reference to a planographio printing machine.

This case is a division of an applicationl filed on the 25th day of May, 1906, Seriali The chief improve the general struct-ure of a plano-i graphic printing machine in which "the printing mechanism consists of van impres-l sion cylinder making one revolution to each impression, a form carrying cylinder, and a 1 printing cylinder adapted to receive a transj fer in ink from the form carrying cylinder1 and print it on the sheet carried by the impression cylinder.

tion proceeds.

Accordingly the invention consists in the hereinafter described features, of construe-1` tion, combination of of elements.

parts and arrangements surface is further provided with the usual In `the accompanying drawings, whichi stripper fingers 13 which place the leading form a part of this specification, the invenembodying the invention.

Fig.f2 isl a sec'-3 tional view on the line 2-2 of Fig. 1. Fig. Q

3 is a detail view of the actuating device.

Similar characters of reference indicate,

corresponding parts in the different views.

1 indicates a framework of any suitable construction for properly mounting the;

parts comprising the machine.

2 denotes an impression cylinder which' in thls instance makes one revolution to .g

each impression.

Preferably it is desiredji to deliver the sheet in front of the impres-' sion cylinder with the printed side up toE any suitable delivery as the well known drop I delivery. As here shown, the tapes 3 indicatethe front delivery mechanism. The impression cylinder as here shown is provided with an impression surface 4 and a transfer surface 5, and suitable means as the transfer cylinder 6 are provided for transferring the sheet from one surface to another. The sheet may be fed to either the impression or transfer surface as desired, but inthe construction here lfollowed the sheet is fed to the transfersurface and transferred to the impression surface, which latter delivers it to the delivery mechanism. In this instance, therefore, for the purpose of deliverling t-he sheet in front of the impression cyly K Z inder, printed side up, the transfer cylinder object of the kinvention is tof is located in front of the impression cylinder and underneath the delivery mechanism.

The transfer surface is Aprovided with the tumbler grippers 7 adapted to be closed by seated grippers 9 adapted to be opened by Other objects will appear as the specicathe cam 10 to seize the sheet when it is delivered from the transfer cylinder, and again to be opened by the cam 11 when the sheet is to be-'delivered to the guides 12 adjacent to the tapes 3. The said impression edge of the sheet on the said guides 12.

The transfer` cylinder is provided with the grippers 14 which are opened twice to each impression alternately by the cams 15 and 16. These cams are pivoted at 17 and are` alternately brought into the plane of the grippers by means of the eccentric 18 connected to the rockshaft 19 by means ofthe i rod 20 and the arm 21, and by means of the lever 22 which is connected by means of the links 23 and 24 to the said cams.

As many form members as are required and as wil-1 be admitted by the capacity of the machine, may be used. Preferably the form member will. be of the character employing an intermediate printing cylinder 25 covered with a rubber blanket 26 adapted to receive a transfer in ink from the form carrying cylinder 27 and adapted to print the same on the sheet carried by the impression surface. In the present instance there is shown in addition to the form member of this character, a Vform. carrying cylinder 28 adapted to coact directly with the iml pression cylinder.

instance, the cylinders 25, 27 and 28 make two revolutions to each impression, so that they are inked twice to each impression. Preferably it is desired to avoid the necessity of moving the cylinders and 28 out of contact 3 vith. .the impression cylinder during alternate revolutions so as to prevent the ink from being transferred to the transfer surface'of the impression cylinder, and the said transfer surface is therefore located below the pitch circumference of the impression cylinder as shown. ASuitable, tripping means are however employed-in connection with these form cylinders, in the present instance, of the following construct'ion: The cylinders 25, 27 and 28 are mounted in eccentric bushings 2.9, and 31. The

eccentricity of the bushing 30 is greater thanfthat of the bushing 29 for reasons which will appear later. The arm 32 of the bushing 30 is connected to the arm 33V of the bushing 29 by means ofthe link 34.

The bushing 29 in turn is connected to the rockshaft 35 by means of the arms 36 and 37 and link 38. 39 denotes, a second rockshaft connected to the rockshaft 33 by means of p the arms 40 and 41 and link 42, and also connected to the bushing 31 by means of-the arms 43 and 44 and rod 45.

46 indicates a lever pivoted on the stud 47 and connected to the rockshaft 39 by means of the arm 48 and link 49. At itsA lower end, this lever 46 carries two sliding pins 50 and 51 interlocked with each other by means of the centrally pivoted lever 52. By means of the spring 33, the pin 30 normally protrudes from its sleeve.

Mounted independently on the stud 47 is the lever 54, one end of which is provided with the roller 55 engaging with the cam 56 making one revolution to each impression, and the other end of which is provided with the shoe 57 adapted to engage whichever of the two pins 50 and 51 is in its path. As previously stated, the pin 50 protrudes, and

`the shoe 57 engaging therewith the parts, if

tripped, will be moved into the position shown in Fig. 1, that is in their untripped position. The parts will then remain in this position, while the lever 34 moves idly back and forth. If now however, the pin 51 is caused to protrude, the lever 34 will move the parts into their tripped position by reason of the shoe 57 engaging with the said pin 51. It will therefore be seen that the tripping means are normally inoperative. Various means may of course be used for rendering the tripping means effective, such as an actuating device connected to an automatic feeding machine. In the present instance, however, an actuating device is illustrated which is under the control of the operator. This actuating device is of the following form. Connected to the foot treadle 58 is a rod 59 engaging with one end of the bell crank 60. The other end of the said bell crank engages with the pin 51 so that when the foot treadle is depressed ,the said pin 5l is caused to protrude. f y It will be understood that when cylinders 25 and 27 are used, the cylinder 27 must be moved a greater distance from the cylinder 25 for the reason that in order to separate the said cylinders 25 and 27 as well as the cylinders 27 and 2, the said cylinder 27 must: move a distance equal to the distance moved by the cylinder 25 in order to separate the latter from the cylinder 2, lus a sutlicient` distance to elfect the separatlon o f 25 and 27. It is for this reason thatfthe eccentricity of the bushing 30 is more pronounced than the eccentricity of the bushing 29 so that when the parts are tripped, the cylinder 27 will move faster than the cylinder 25, during the same period 'of time, and hence, it will move a greater distance.

Furthermore, when the cylinders 25 and l27 are untripped, it is obvious that the parts must be so arranged that the said cylinders are brought into contact before the leading end of the impression surface'of the im` pression cylinder reaches the point-of contact between the printing and-.impression cylinders; as the leading end of the transfer 1n ink must reach'the said oint of contact `end of the impression surface reaches the said point of contact. In connection with the cylinders 27 and 28 are provided the usual ink rolls 61 and 62 and the water rolls 63 and 64.

I claim:

1. In a printing machine, the combination of a transfer cylinder, an impression cylinder making one revolution to each impression, an impression surface on the said impression cylinder, a transfer surface on the said impression cylinder, and means for transferring the sheet from the transfer surface to the impression surface, the parts being constructed and arranged so that the sheet is taken by the transfer surface of the impression cylinder and transferred to the transfer cylinder and from the transfer cylinder back to the impression surface, printd, and delivered from the impression surace.

2. In a printing machine, the combination olut-ion to each impression, an impression surface on the said impression cylinder, a transfer surface on the said impression cyl-- inder, a transfer cylinder located in front of the impression cylinder for transferring the sheet from the transfer surface tothe impression surface, and a form member to cooperate with the impression surface, located in rear of the transfer cylinder in point of time.

3. In a printing machine, the combination With an impression cylinder making onerevelution to each impression, an impression surface on the said impression cyllnder, a transfer surface on the said impression cylinder, a transfer cylinder located in front of the impression cylinder for transferring the sheet from the transfer surface to the impression surface, a delivery mechanism in front of the impression cylinder and above the transfer cylinder, and form members cooperating with the impression cylinder and located sequentially in, point of time with respect to the transfer cylinder.

4:. The combination in a printing machine, of an impression cylinder having an impression surface and a transfer surface, a transfer cylinder located near the feeding point of the impression cylinder and adapt- 'ed to transfer the sheets from the transfer ISABELLA SCOTT, DAVID J. SCOTT, Eeoutors of the estate of Walter Scott.

Witnesses:

AXEL V. BEEKEN, J. CLYDE RIPLEY. 

